钢模板计算书

1、模板计算书1.计算依据1参考资料建筑结构施工规范 gb 500092001钢结构设计规范 gb 500172003木结构设计规范 gb 500052003混凝土结构设计规范 gb 500102002钢结构工程施工质量验收规范 gb 50205-20012.侧压力计算混凝土作用于模板的侧压力，根据测定，随混凝土的浇筑高度而增加，当浇筑高度达到某一临界时，侧压力就不再增加，此时的侧压力即为新浇筑混凝土的最大侧压力。侧压力达到最大值的浇筑高度称为混凝土的有效压头。通过理论和实践，可按下列二式计算，并取其最小值： 式中 f-新浇筑混凝土对模板的最大侧压力（kn/m2） c-混凝土的重力密度（kn/m3

2、），此处取26kn/m3 t0-新浇混凝土的初凝时间（h）,可按实测确定。当缺乏实验资料时，可采用t0=200/(t+15)计算；假设混凝土入模温度为250c，即t=250c，t0=5v-混凝土的浇灌速度（m/h）;取2.5m/hh-混凝土侧压力计算位置处至新浇混凝土顶面的总高度（m）;取9m1-外加剂影响修正系数，不掺外加剂时取1；掺具有缓凝作用的外加剂时取1.2。 2-混凝土塌落度影响系数，当塌落度小于 30mm时，取0.85；5090mm时，取1；110150mm时，取1.15。大模板侧压力计算 =26x9=234kn/m取二者中的较小值，f=45.2kn/ m2有效压头高度：倾倒混凝土

3、产生的水平载荷标准值4.0 kn/ m2 柱模板侧压力计算 =26x9=234kn/m取二者中的较小值，f=52kn/ m2有效压头高度：倾倒混凝土产生的水平载荷标准值6.0 kn/ m2 综上,大模板混凝土侧压力标准值为45kn/m2,设计值为60kn/m2；柱模板混凝土侧压力标准值为52kn/m2,设计值为80kn/m2。3.模板计算模板浇筑高度为2.85m，面板采用5mm冷轧钢板；竖向背楞采用8#槽钢，间距为300mm；水平背楞采用双10号槽钢背楞，间距1000mm,每隔1000x1000间距设置d20拉杆一道。 3.1面板验算将面板视为支撑在8#槽钢的三跨连续梁计算，面板长度取板长10

4、00mm，板宽度b=1500mm，面板为5mm厚冷轧钢板,8#槽钢间距为300mm。3.1.1强度验算作用在面板上的线荷载为： =60x1=60n/mm面板最大弯矩：=60x300x300/10=0.54x106nmm面板的截面系数：=x1500x52=6.25x103mm3应力：=0.54x106/6.25x103=86.4n/mm2=215 n/mm2 故满足要求其中：-钢材抗弯强度设计值，取215 n/mm2e-弹性模量，钢材取2.1x105 n/mm23.1.2挠度验算：挠度验算采用标准荷载，同时不考虑振动荷载的作用，则线荷载为：面板挠度由式=45x3004/(150x2.1x1000

5、00x1.56x104) =0.74mm=300/400=0.75mm 故满足要求面板截面惯性矩：i=bh3/12=1500x53/12=1.56x104mm43.2 8#槽钢验算：8#槽钢作为竖肋支承在横向背楞上，可作为支承在横向背楞上的连续梁计算，其跨距等于横向背楞的间距最大为l=1000mm。8#槽钢的线荷载为： =60x0.3=18n/mm-10#槽钢之间的水平距离3.2.1强度验算最大弯矩=0.1x18x10002=1.8x106nmm8#槽钢截面系数：应力：=215n/mm2 满足要求8#槽钢截面惯性矩：3.2.2刚度验算：挠度验算采用标准荷载，同时不考虑振动荷载的作用，则线荷载为

6、：悬臂部分挠度：w=ql4/8ei=13.5x6004/(8x2.1x105x101x104)=1mmw=1.2mmw-容许挠度，w=l/500,l=600mm 跨中挠度：w= q2l4（5-242）/384 ei =13.5x10004(5-24x0.6)/(384x2.1x105x101x104)=1.56mmw=2.5mm 满足w-容许挠度，w=l/400,l=1000mm-悬臂部分长度与跨中部分长度之比，= 600/ l000=0.6。3.3槽钢背楞验算：槽钢作为主背楞支承在对拉螺杆上，可作为支承在拉杆上的连续梁计算，其跨距等于对拉螺栓的间距最大为l1=1000mm。3.3.1强度验算

7、 侧压力作用在槽钢上的集中荷载为：最大弯矩=0.1x60x10002=6x106nmm应力：=215n/mm2 满足要求双10#槽钢截面系数：w=39.7x2x103=79.4x103 mm3其中：fm钢材抗弯强度设计值，取215n/mm2;i10槽钢的惯性矩，i=198x104mm4e钢材弹性模量，取2.1x105n/mm2;3.3.2刚度验算：挠度验算采用标准荷载，同时不考虑振动荷载的作用，则线荷载为：悬臂部分挠度:w=q14/8ei=45x5004/(8x2.1x105x2x198x104)=0.42mmw=1.3mmw-容许挠度，w=500/500,l=500mm跨中部分挠度w= ql

8、4（5-242）/384 ei =45x10004x(5-24x0.5)/(384x2.1x105x198x2x104)=1mm48kn 故满足要求。acknowledgements my deepest gratitude goes first and foremost to professor aaa , my supervisor, for her constant encouragement and guidance. she has walked me through all the stages of the writing of this thesis. without her

9、consistent and illuminating instruction, this thesis could not havereached its present form. second, i would like to express my heartfelt gratitude to professor aaa, who led me into the world of translation. i am also greatly indebted to the professors and teachers at the department of english: prof

10、essor dddd, professor ssss, who have instructed and helped me a lot in the past two years. last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. i also owe my sincere gratitude to my friends and my fellow classmates who gave

11、me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis. my deepest gratitude goes first and foremost to professor aaa , my supervisor, for her constant encouragement and guidance. she has walked me through all the stages of the writing

12、 of this thesis. without her consistent and illuminating instruction, this thesis could not havereached its present form. second, i would like to express my heartfelt gratitude to professor aaa, who led me into the world of translation. i am also greatly indebted to the professors and teachers at the department of english: professor dddd, professor ssss, who have instructed and helped me a lot in the past two years. last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years